DE1220295B - Device for strip-shaped coating of webs - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 05 c

German class: 75 a - 20

Number: 1220 295

File number: B 701851 b / 75 a

Filing date: December 31, 1962

Opening day: June 30, 1966

It is already known to use sheet-like materials with a strip-like coating to provide that each strip of the coating is separated from the neighboring strip by a strip of uncoated Material is separated. Such strip-shaped coatings are applied usually with rollers which are grooved according to the strips to be applied. Even it is known to use doctor blades which are provided with separating plates for the same purpose. Spreading troughs can also be used which have covering devices on their underside, e.g. B. sheets, Wires, etc., have. Both when using engraved rollers and when using them of pretending knives or pretending boxes with piano stitches However, difficulties arise which are due, among other things, to the fact that the strip-shaped applied paste tends to adhere to the grooves or the piano strings. This tendency to Adherence to the grooves or piano strings means that the paste does not get into the required dimensions anchored to the carrier sheet. Eä were therefore with the previous devices s ^ effen-shaped coated fabrics are obtained, the coating does not have the mechanical resistance required for use.

«P '

p.,

^ The subject of the present invention is now

A device for the areal coating of banners with plastic paste in the form of strips separated from one another, by means of which _: the disadvantages mentioned are avoided. The new device consists of a Zafj | arranged transversely to the direction of movement of the train and corresponding to the number of stripes 'of coating openings having, working under pressure coating head and is characterized in that the coating head has a surface running parallel to the direction of movement of the web with webs separating the openings, lying in the direction of movement and forming contact surfaces for the web. In the device characterized in this way, the paste to be applied in strips to the carrier is accordingly not applied in front of the coating tool, as was previously the case when using grooved rollers and doctor blades with covering devices. Rather, the paste is applied here in the space bounded laterally by the webs with the aid of the openings which are arranged in the coating head. The device according to the invention is particularly suitable for processing plastic pastes that are used in a device for strip-shaped coating before the coating process
of tracks

Applicant:

JH Benecke Beteiligungsgesellschaft
with limited liability & Co. KG,
Vinnhorst (Hann.)

Named as inventor:

Gerhard Knitsch, Hellendorf (Hann.)

Treatment in vacuo to be subjected to the The aim is to completely remove trapped air and other volatile components. The pastes will subjected to a precisely regulated pressure in the paste distribution container, the size of which depends on the Viscosity of the paste and the desired paste

special order is directed. With the device according to the invention is it possible to apply coating strips that are firmly anchored to the support surface and are of more uniform, Surface.

The Vprflchtung the invention enables both the application of a single color and a multicolor strip-shaped coating. In the latter case, the paste distribution container is in "two or." divided into several chambers, each chamber with one of the differently colored Pastes is loaded. Here, too, each channel of the string head is marked with the pas. th distribution container tied together. However, since the bores or slots only open into one of the chambers, one obtains a multicolored design that depends on the order in which and the relationship to each other the holes open into the individual chambers.

Embodiments of the invention are shown in the drawing. It shows

A b b. 1 a schematic side view of a device for single-color strip coating,
From b. 2 a detail from Fig. 1,
A b b. 3 a section along line Ι-Γ of A b b. 2, A b b. 4 shows a section through one with the one in A b b. 1 to 3 illustrated device coated web,

Fig. 5 shows a detail of a further embodiment, which is used for two-tone stripe coating,

A b b. 6 a section along line ΙΙ-ΙΓ of A b b. 5, A b b. 7 shows a section through one with the device according to A b b. 5 and 6 coated web,

609 587/13 +

3 4

Fig. 8 a detail of a device in the side of these channels at least one hole in each case

borrowed cut, which ends in the manufacture of a three-way,

colored strips of coated material is used, an embodiment of such a coating head

Fig. 9 a section along the line-ΙΙΓ of the application of a single-colored strip-shaped

Fig.Sund 5 coating is shown in Figs. 2 and 3.

Fig. 10 a section through one with the front. Only one of these leads to each canal

Direction according to Fig. 8 and 9 coated sheet. Drilling. It can be useful, however, behind

The row of bores shown, which is initially located in a container 1, has more

Layering paste is arranged via a suction pipe 2 and such rows.

Valve 3 in a closed pressure vessel 10 ίο The in the Ab b. 5 and 6 shown execution

sucks. This is via a valve 4 and a compressed air form is intended for a two-tone coating,

reducing valve 5 to a compressed air line 6 and over the paste distribution container 20 is here by a

a vacuum line 8 and a valve 9 to a partition wall 30 in two independent from each other

Vacuum pump 7 connected. The pressure vessel is divided into chambers, which are used to accommodate the

10 is equipped with a pressure gauge 11 and 15 different colored pastes are used,

Via the paste feed line 26 with the paste, each chamber is separately connected to one

distribution container 20 connected. In the paste feeder equipped with a pressure vessel

supply line there are valves 12 and 13 connected to the device, which is shown in Fig. 1

as well as a paste filter 14. The paste distribution corresponds to, in A b b. 5, however, not in more detail

container 20 has a vent valve 15 and a 20 is executed. The two chambers of the paste pressure gauge 19 on. It is also via a valve. Distribution tank can be connected to a common

16 and a compressed air pressure reducing valve 17 can be connected to a pressure element. It is more expedient

Compressed air line 18 connected. The conclusion of the, however, a separate Druckorgaü for each chamber

Paste distribution container forms the interchangeable to provide, as the individual pigments the viscosity

Coating head 21, under which the counter roller 22 25 of the paste is, experience has shown, in different ways

which influence the size of the carrier to be coated. By differentiating the

material, e.g. B. the fabric 23, out and acting with two differently colored pastes

the strip-wise coating 24 is provided. This makes it possible to detect differences in the

To produce the coating in strips, equalize the viscosities of the pastes to be applied a certain amount of 30 and a uniform paste application is achieved on the fabric 23, Paste intended to be applied to the fabric from The paste is also applied with this ■ Ausdem Container 1 by creating a vacuum with guide shape with the help of Bohrunugen 27, the Using the vacuum pump 7 in the pressure vessel 10, the paste distribution container with the channels on the sucked. After closing the valve 3 can further connect the underside of the coating head. Since the evacuated to the 35 paste distribution container enclosed in the paste, but in this case in Remove air and volatile components. After two chambers are divided, so are the bores Completion of the degassing process is divided into two groups, one group the valve 9 and brings the pressure vessel 10 through into the first chamber, the other into the second chamber Opening the valve 4 of the compressed air line 6 opens onto the. The ratio of the in the first chamber to transport the paste in the paste distribution 40 opening holes to the in the second chamber container 20 required pressure. After reaching the end can be chosen arbitrarily; it judges this pressure becomes a measured amount of the two-tone strip paste to be achieved by opening valves 12 and 13 in the design. For example, if those in a row next to paste distribution containers pressed, which in turn is alternately arranged holes in which is under a precisely regulated pressure. One receives one chamber around one and one in the other To enable continuous coating is first and foremost from A b b. 7 visible design in which on seen that the container 10 is duplicated, a strip in one color in each case a different with the same fittings. This colored stripe follows. Of course you can In this way, the container 20 can also have two or more arranged side by side without releasing the pressure constantly refilled. 50 holes each lead into the same chamber.

The end of the paste distribution container. A design is then obtained in which on two or 20 forming coating heads 21 there are more stripes of the same color transversely to the movement, in each case one or also in the direction of the fabric web 23 and several stripes of different colors follow,
stretches across its entire width. He points to the in A b b. The embodiment shown in FIG. 5 has through bores 27 (FIG. 2), which in 55 leads to each channel on the underside of the face of one or more rows of side by side only one bore. Of course, they are net and their number and arrangement can, however, also provide further bores opening into the same corresponding to the chamber to be applied to the fabric web.
Coating strip corresponds. On the underside of the embodiment shown in Figs. 8 and 9, the coating head is provided with webs 28, which are tightly 60 in shape for the production of a three-colored strip rest on the fabric web 23 and this is intended against dessins. The paste distribution container 20 presses the anvil roller 22. The webs 28 run in here is accordingly divided into three chambers by two partitions 30 in the direction of movement of the fabric web, each of which has a sharp edge. The different colored paste is fed through the webs 28. Each channel on the underside of the coating head in the direction of movement 6g of the underside of the coating head is each formed by a channel running through the fabric web, the bore with one of the three chambers of the paste lined up like gaps in a comb. Distribution tank connected. The order in which the bores 27 are arranged so that in each of the channels are connected to the chambers.

results in the design. In the case of the in A b b. 8 and 9, the first channel is connected to the left chamber x, the second channel to the middle chamber y and the third channel to the right chamber ζ . A three-colored stripe design is obtained, as is shown schematically in Fig. B. 10 can be seen.

In the illustrated embodiments it is provided throughout that between the applied Coating strips, there is a smaller or larger distance, which is determined by the width of the webs 28 will. The fabric is therefore not coated in these spaces. Becomes an air-permeable If fabric is used as the carrier material for the strip coating, one obtains in this way a air-permeable synthetic leather, which compared to fully coated synthetic leather when used as Upholstery has great merits.

With the help of the coating device shown above, however, a carrier material, ζ. B. ao Fabric, fully coated in multi-colored stripes without any gap. This is then possible if the webs 28 are designed as narrow as possible and pointed in the running direction. the Applied paste strips then flow immediately bar behind the webs 28 together. In this way, for example, multi-colored striped Produce webs that are impermeable to water and air.

Claims (6)

Patent claims: 1. Device for the extensive coating of webs with plastic paste in the form of separate strips with a transverse to the direction of web movement, one the number of stroking openings corresponding to the number of strips, under pressure working stroking head, characterized in that the stroking head (21) has a for Direction of movement of the web parallel surface with the openings (27) separating from each other, webs (28) lying in the direction of movement and forming contact surfaces for the web having. 2. Apparatus according to claim 1, characterized in that between two adjacent Web (28) a plurality of openings (27) are arranged one behind the other in the direction of web movement. 3. Apparatus according to claim 1 and 2, characterized in that the webs end with sharp edges in the direction of movement of the web at the coating plane. 4. Apparatus according to claim 1 to 3, characterized in that the coating head the lower Forms the conclusion of a paste distribution container (20). 5. Apparatus according to claim 1 to 4, characterized in that the openings to different Chambers of the paste distribution container (20) are connected. 6. Apparatus according to claim 5, characterized in that the chambers below individually adjustable pressures can be set. Considered publications:
German Patent Nos. 73 490, 629 238;
German Auslegeschrift No. 1016 227;
German patent application L 14083 X / 39 a
(announced on October 18, 1956);
U.S. Patent No. 2,544,173. For this purpose 2 sheets of drawings 609 587/134 6.66 © Bundesdruckerei Berlin